/Engine/Source/Runtime/Engine/Classes/Engine/TextureLODSettings.h
void GetDownscaleOptions ( const [UTexture](API\Runtime\Engine\Engine\UTexture) & Texture, const [ITargetPlatform](API\Developer\TargetPlatform\Interfaces\ITargetPlatform) & CurrentPlatform, float & Downscale, ETextureDownscaleOptions & DownscaleOptions ) const